(Google Maps Plugin) [map query="all posts"] isn't working for me

I tried using this syntax to display a map with all my locations:

[map query="all posts"]

The documentation says "This shows all maps associated with any posts on the site." However, I have two map posts on my site, but nothing shows up with this short code, not even a map at all. Is this the correct syntax?

I tried this one and it does show a map with a random location:

[map query="random"]

Is this correct syntax, and if so, can you test it and confirm whether it should work? Thanks!